CODEWITHSUNDEEP
javascriptnode.jssocket.io
user8482505
user8482505

Reputation:

Periodically call node.js function every second

I have a node.js server and client. The client has a video.js player, progressbar.js and socket.io. I want progressbars to show buffer percentage of other users.

Here is piece of server source

function updateProgressBars() {
  io.sockets.emit('updateProgressBars'); //Send data to everyone
}

socket.on('userProgressBarUpdate',
  function(data) {
    socket.broadcast.emit('changeLocalProgressBar', data); //Send data to everyone but not sender
  });

And here is client

socket.on('updateProgressBars',
function() {
  var bufferLevel = myPlayer.bufferedPercent();
  var data = {
    bl: bufferLevel,
    n: name
  }

  socket.emit('userProgressBarUpdate', data); //Send data to server
});

changeLocalProgressBarLevel is just changing progressbars on client side so dont worry about it.

How can I make updateProgressBars() be called every second.

Upvotes: 13

Views: 31247

Answers (3)

Jehy
Jehy

Reputation: 4899

using setInterval is not the best choise because you should always clearInterval. I prefer using recursion with bluebird promises:

function a()
{
  if(smthCompleted)
    dosmth();
  else return Promise.delay(1000).then(() => a());
}

This way you have much better control of your code.

Upvotes: 7

Nolyurn
Nolyurn

Reputation: 608

You can use setInterval(function(){ ... }, timeMiliSeconds)

setInterval(function(){ console.log("hi")},1000) //logs hi every second

Upvotes: 14

Flocke
Flocke

Reputation: 1035

You can achieve this by using f.e. the "setInterval" function.

function doStuff() {
    //do Stuff here
}
setInterval(doStuff, 1000); //time is in ms

And even better:

let myVar = setInterval(function(){ timer() }, 1000);

function timer() {
//do stuff here
}

function stopFunction() {
    clearInterval(myVar);
}

Upvotes: 6

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